A = (5, 1)
B = (6.7230485963950875, 0.33400057471556094)
D = (7.607090555042679, 2.234690785807897)
C = (1.2419884527800136, 0.1129900850536614)
g = Polynomial({A, B, C, D})
E = Point(g)
a = Tangent(E, g)
a_1 = Slope(a)
g'(x) = g'(x)
M: (x(E), a_1)